DENVER (AP)  Alex Oshmyansky may be in his second year of medical school, but he still can't buy a drink.

He is 20.

Oshmyansky, who took only a whole year to graduate college, is on his way to becoming a brain surgeon so he can study the mathematical modeling of the brain's pathways. The possibilities include finding ways for paraplegics or quadriplegics to move prosthetic devices using brain waves.

Oshmyansky graduated from high school in 2002 and from the University of Colorado at Boulder in 2003. He is in his second year of medical school at Duke University. This fall, he'll pursue a doctorate in mathematical biology at Oxford University as one of 40 Americans awarded a Marshall Scholarship from the British government.